[protocol] Make ContextURL.parseToURL support the newly-accepted 'git@{host}:{user}/{repo}.git' format

Fixes #8097
Companion to #7951

Author: jankeromnes

components/gitpod-protocol/src/context-url.spec.ts

@@ -24,6 +24,12 @@ export class ContextUrlTest {
         expect(actual?.pathname).to.equal("/gitpod-io/gitpod-test-repo");
     }
 
+    @test public parseContextUrl_withEnvVar_sshUrl() {
+        const actual = ContextURL.parseToURL("passedin=test%20value/[email protected]:gitpod-io/gitpod-test-repo.git");
+        expect(actual?.host).to.equal("github.com");
+        expect(actual?.pathname).to.equal("/gitpod-io/gitpod-test-repo.git");
+    }
+
     @test public parseContextUrl_withPrebuild() {
         const actual = ContextURL.parseToURL("prebuild/https://github.com/gitpod-io/gitpod-test-repo");
         expect(actual?.host).to.equal("github.com");
@@ -35,5 +41,10 @@ export class ContextUrlTest {
         expect(actual?.host).to.equal("github.com");
         expect(actual?.pathname).to.equal("/gitpod-io/gitpod-test-repo");
     }
+
+    @test public parseContextUrl_badUrl() {
+        const actual = ContextURL.parseToURL("[Object object]");
+        expect(actual).to.be.undefined;
+    }
 }
 module.exports = new ContextUrlTest()

components/gitpod-protocol/src/context-url.ts

@@ -26,12 +26,19 @@ export namespace ContextURL {
       return new URL(segments[0]);  // this might be something, we just try
     }
 
-    const segmentsToURL = (offset: number): URL => {
+    const segmentsToURL = (offset: number): URL | undefined => {
       let rest = segments.slice(offset).join("/");
+      if (/^git@[^:\/]+:/.test(rest)) {
+        rest = rest.replace(/^git@([^:\/]+):/, 'https://$1/');
+      }
       if (!rest.startsWith("http")) {
         rest = 'https://' + rest;
       }
-      return new URL(rest);
+      try {
+        return new URL(rest);
+      } catch (error) {
+        console.error('Could not parse context URL', rest, error);
+      }
     };